Specificity of molecular recognition learned from the crystal structures of TRAIL and the TRAIL:sDR5 complex
Sun-Shin Cha1, Young-Lan Song, Byung-Ha Oh
1Beamline Division, Pohang Accelerator Laboratory, Korea.
Abstract:
TRAIL is a member of the tumor necrosis factor (TNF) superfamily. TRAIL has drawn a lasting attention because of its selectivity and efficacy in inducing apoptosis in a variety of cancer cells but not in normal cells. The structures of both TRAIL and the protein in complex with the extracellular domain of death receptor 5 (sDR5) were elucidated. Because each factor of the ligand family and the receptor family is large, it poses an intriguing question of how recognition between cognate ligands and receptors is achieved in a highly specific manner without cross interactions. This review focuses on the unique properties of TRAIL and molecular strategies for the specific recognition between the two family members primarily based on the crystal structures of TRAIL and the TRAIL:sDR5 complex.
Insights
Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) selectively triggers cancer cell death. This review explores TRAIL
Area of Science:
- Biochemistry
- Molecular Biology
- Structural Biology
Background:
- Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) is a key mediator of programmed cell death.
- TRAIL exhibits selective toxicity towards cancer cells, sparing normal tissues.
- Understanding TRAIL-receptor interactions is crucial for cancer therapy development.
Purpose of the Study:
- To review the unique properties of TRAIL.
- To elucidate molecular strategies governing specific TRAIL-receptor recognition.
- To analyze the structural basis of TRAIL:death receptor interactions.
Main Methods:
- X-ray crystallography was used to determine the structures of TRAIL and its complex with the extracellular domain of death receptor 5 (sDR5).
- Structural analysis focused on identifying molecular features responsible for specific ligand-receptor binding.
- Comparative analysis of TRAIL family ligands and death receptors.
Main Results:
- The crystal structures of TRAIL and the TRAIL:sDR5 complex reveal detailed molecular interactions.
- Specific recognition mechanisms between TRAIL and its cognate receptors are identified.
- Structural insights explain the high specificity of TRAIL interactions within the TNF superfamily.
Conclusions:
- TRAIL's unique structural features facilitate selective apoptosis induction in cancer cells.
- Molecular strategies, revealed by structural studies, ensure specific recognition between TRAIL and death receptors.
- These findings provide a foundation for designing targeted cancer therapeutics based on TRAIL signaling.
